Tension attachment for shears.



N0. 828,362. PATBNTED AUG. 14, 1906.

H. GLAUSS. TENSION ATTACHMENT POR SHEARS.

APPLICATION FILED JUNE 19I 1905.

www.

wml

lmtusses z nucntm' Hamel/IS. Xia @(044,

THE Nonni: PETERS co., wAsHmGroN, D. c,

UNITED STATES PATENT OFFICE.

" TENSION ATTACHMENT FOR SHVEARS.

Specification of Letters Patent.

Patented Aug. 14, 1906.

Application iiled June 19, 1905. Serial No. 265,875.

To @ZZ whom, it may concern: i

. adjustin Be it known that I, HENRIE CLAUss, a citi- -zen ofthe UnitedStates, residing at Fremont, inthe county of Sandusky, State of Ohio,have invented certain new and useful full, clear, and exactdescriptionofthe inven-v tion, such as will enable othersskilled in the art towhich it appertains to make and use the same, reference being had to theaccompanying drawings, and to the igures of reference marked thereon,which form a part of this specification.

This invention relates to a tension attachment for shears; and itconsists in the construction and arrangement of parts hereinafter fullyset forth, and pointed out particularly in the claims.

The object of the invention is to provide simple and efficient means forregulating or the tension on the blades of the shears, t e arrangementbeing such as to obviate any change of adjustment after it has been onceeifected, the adjustment remaining undisturbed whether set tightly orloosely, enabling the shears to be operated as long as desired withoutany change-in the tension upon the blades.

The above object is attained by the structure illustrated in theaccompanying drawings, in which- Figure 1 is an elevation of a pair ofshears with my improved tension attachment mounted thereon. Fig. 2 is anenlarged transverse section through the attachment and shear-blades ason line 2 2 of Fig. 1. Fig. 3 is a perspective view of the looped metalstrap which embraces the blades and receives the screw-bolt upon whichthey are lpiyfoted. Fig. 4 is a perspective view of said Referring tothe characters of reference, 1 and 2 designate the blades of the shears,which are apertured, as at 3, to receive the pivot-bolt 4. Said bolt isprovided with a rounded head 5 and with a threaded stem in which isformed a longitudinal channel 6. Embracing the blades of the shears is aloop 7, which may be made of spring metal to eX- ert a slight pressureagainst the outer faces of the blades to normally hold them together.The terminals of said loop are enlarged, as at 8 and 9. Formed throughterminal 8 is an aperture 10, around which aperture the metal isdepressed to afford a countersink for the Vconicalinner face illfofy thehead 5. In

the opposite terminal 94 of. said loop is ,an aperture 12, adapted toreceive the opposite end of the bolt 4, and projectingv into said ap-.erture is a tongue 13, adapted t0 `engagein the slot 6, whereby thebolt is locked ,to-:the metal loopand is held from `rotatingindependently thereof. Screwedl upon .the projecting end of the bolt 4is a knurlednut14, which bears against the end portion 9 of the loop 7and by means of which any desired tension may be placed upon the bladesof the shears. By countersinking the metal of terminal 8 around theaperture 1() an inwardlyprotruding cone 15 is formed, which enters thereamed outer opening of the shear-blade 1, as shown in Fig. 2, wherebythe screw-bolt is centered in said openin and a cone-bearing-is affordedfor said b ade. The bolt 4 passes freely through the apertures of theblad es, so that when the nut 14 is tightened, so as to crowd the bladestogether, an equal bearing against the outer faces of the blades iseffected, and consequently an equal tension is applied thereto. Becauseof the fact that the tongue 13 engages in the slot in the bolt 4 saidbolt and tongue are locked together. The terminal 9 of the loop servesas a washer against which the nut 14 binds, and because of the factythat there is no movement between the washer and bolt the movement ofthe shear-blades, which are free upon the bolt, cannot disturb theadjusting-nut, so that any desired degree of tension may be maintained.The loop 7, which embraces the shear-blades, allows a limited turningmovement of the bolt within the blades; but said loop is arrested bycontact with the blades when turned into engagement therewith, therebyenabling the nut to be screwed onto and off. of the bolt to vary thetension as desired.

Having thus fully set forth my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. A tension attachment for shears, comprising a looped member adaptedto embrace the blades, a bolt passing freely through the blades andthrough said member, said bolt being locked to the lattery to preventindependent rotation, and an adjusting-nut upon said bolt screwed intocontact with one terminal of said member.

2. In a tension attachment for shears, the combination with the blades,of the loop embracing the blades, having apertured terminals, one ofwhich is irregular, a bolt passing through the blades and through theterminals of said loop, said bolt having an irre ular formation at oneend to iit the irregu ar aperture in the terminal of the loop to reventindependent rotation of the bolt, an an adjusting-nut upon said boltscrewed into contact with one terminal of said loop.

3. In a tension attachment for shears7 the combination with the bladeshaving registering apertures therethrough, a loop embracing the bladeshaving aperturedterminals, a bolt passing through the terminals of theloop and through the blades, said bolt having a channel in its threadedend, a ton ue projecting into one of the apertures of the loop and lyingin said channel, and an adjusting-nut upon said bolt.

HENRIE CLAUSS.

Witnesses:

ARTHUR STULL, B. H. ADLER.

